65804880 has 40 divisors (see below), whose sum is σ = 203995872. Its totient is φ = 17547904.

The previous prime is 65804839. The next prime is 65804881. The reversal of 65804880 is 8840856.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65804881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136854 + ... + 137333.

Almost surely, 2^65804880 is an apocalyptic number.

65804880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65804880 is an abundant number, since it is smaller than the sum of its proper divisors (138190992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65804880 is a wasteful number, since it uses less digits than its factorization.

65804880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274203 (or 274197 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 65804880 is about 8112.0207100327. The cubic root of 65804880 is about 403.7253631284.

The spelling of 65804880 in words is "sixty-five million, eight hundred four thousand, eight hundred eighty".